...The class of Polyps is divided into three orders,—the Halcyonoids, theMadreporians, and the Actinoids... 
Elizabeth Cabot Cary Agassiz 「Seaside Studies in Natural History」
...Here thepartitions are reduced to eight; the tentacles, according to the invariablerule, agree in number with the chambers, but have a far more highlycomplicated structure than in the lower Polyps...
Elizabeth Cabot Cary Agassiz 「Seaside Studies in Natural History」
...Among the nomadic Polyps is a small floating Actinia, called Arachnactis,(,) from its resemblance to a spider...
Elizabeth Cabot Cary Agassiz 「Seaside Studies in Natural History」
...But we must not leaveunnoticed one very remarkable Hydroid Acaleph (), not found in ourwaters, and resembling the Polyps so much, that it has long been associatedwith them...
Elizabeth Cabot Cary Agassiz 「Seaside Studies in Natural History」
...One of the polyps is carefully removed by the dipping-tube,a small glass tube, open at both ends...
Henry J. Slack 「Marvels of Pond-life」
...Although the polyps are remarkable for the simplicityof their organization, they do not the lessexhibit the wonderful nature of animal life...
Henry J. Slack 「Marvels of Pond-life」
...However this may be, the polyps, andsimilarly endowed creatures, have the power of dartingout their poison threads with considerable force, andMr...
Henry J. Slack 「Marvels of Pond-life」
...We alsofind this remarkable phenomenon among other animals, such as the graceful,bell-shaped zoophytes, which we call polyps and medusæ...
Ernst Haeckel 「The Evolution of Man」
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